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"Reference" TDA1541A DAC with I2S-BUS architecture
"Reference" TDA1541A DAC with I2S-BUS architecture
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Old 13th June 2011, 12:07 PM   #721
dvb projekt is offline dvb projekt  Germany
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"Reference" TDA1541A DAC with I2S-BUS architecture
Exclamation DDNF I/V module progress report

All parts on the DDNF I/V module are assembled.

Click the image to open in full size.

Also the Salas Shunt regs for the +/- 19V and +15V bias voltage line are ready.

Click the image to open in full size.

Click the image to open in full size.

The DDNF PSU module will arrive tomorrow, so testing could start this week.



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Old 17th June 2011, 06:09 PM   #722
dvb projekt is offline dvb projekt  Germany
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"Reference" TDA1541A DAC with I2S-BUS architecture
Exclamation DDNF I/V module progress report

Also the PSU module is now assembled.

Click the image to open in full size.
Click the image to open in full size.

The testing begins tomorrow.


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Old 17th June 2011, 06:40 PM   #723
studiostevus is offline studiostevus  Netherlands
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Looking forward to your impressions
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Old 19th June 2011, 03:23 PM   #724
dvb projekt is offline dvb projekt  Germany
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"Reference" TDA1541A DAC with I2S-BUS architecture
Exclamation DDNF I/V module progress report

I have uploaded an overview of the complete DDNF I/V output stage in my blog.

Start of delivery will be delayed, because i have a strong voltage drop on the -19V line after connecting this line to the Shunt module.

When ive fixed this problem i report back.


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Old 19th June 2011, 04:33 PM   #725
dvb projekt is offline dvb projekt  Germany
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"Reference" TDA1541A DAC with I2S-BUS architecture
Quote:
Originally Posted by dvb-projekt View Post


When ive fixed this problem i report back.

Ive found the problem!!!

In my PCB designing SW the Emitter & Collector of the BC557C are in the wrong direction.



So they must soldered in the opposite direction.

I will try to solder a new pcb today because thats faster as desolder all parts from the 1st pcb.

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Old 19th June 2011, 08:52 PM   #726
dvb projekt is offline dvb projekt  Germany
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"Reference" TDA1541A DAC with I2S-BUS architecture
Exclamation DDNF I/V Stage Module running

I have soldered a new pcb with the BC557C in the opposite direction.

Its running perfect!




All pre orders could now start immediately.


Best regards,
Oliver
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Old 19th June 2011, 08:54 PM   #727
studiostevus is offline studiostevus  Netherlands
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Congrats!

How does it sound? Or is it too early?
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Old 19th June 2011, 09:00 PM   #728
dvb projekt is offline dvb projekt  Germany
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"Reference" TDA1541A DAC with I2S-BUS architecture
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Originally Posted by studiostevus View Post
Congrats!

How does it sound? Or is it too early?
Its to early, yes. I let it burn in for the next 40 hrs. before i try a serious listening session.
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Old 19th June 2011, 09:18 PM   #729
ernesternest is offline ernesternest  Europe
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Congrats!

How does it sound? Or is it too early?
Very very good question :-)
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Old 23rd June 2011, 10:24 AM   #730
antonioo is offline antonioo  Netherlands
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Nice PCB's,
If i understand it : we get a total of 8-9 shunts. Isn't it posible to reconsider
the shunt's this way : 1 shunt pcb with +19/-19/+15 (15v in the open space in the middle) May be the new psu pcb can feed the DAC also?
We try to get all in one cabinet, to please the householdmember's
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